Electrophysiological signatures of dedifferentiation differ between fit and less fit older adults.

ABSTRACT: Cardiorespiratory fitness was found to influence age-related changes of resting state brain network organization. However, the influence on dedifferentiated involvement of wider and more unspecialized brain regions during task completion is barely understood. We analyzed EEG data recorded during rest and different tasks (sensory, motor, cognitive) with dynamic mode decomposition, which accounts for topological characteristics as well as temporal dynamics of brain networks. As a main feature the dominant spatio-temporal EEG pattern was extracted in multiple frequency bands per participant. To deduce a pattern's stability, we calculated its proportion of total variance among all activation patterns over time for each task. By comparing fit (N = 15) and less fit older adults (N = 16) characte

SUBMITTER: Goelz C 

PROVIDER: S-EPMC8448815 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature